An improved charge pump power factor correction electronic ballast

摘要

An improved charge pump power factor correction (CPPFC) electronicnballast using the charge pump concept is proposed in this paper. Circuitnderivation, principle of operation, and the conditions for achievingnunity power factor are discussed. The proposed electronic ballast isnimplemented and tested with two 40 W fluorescent lamps. It is shown thatn84% of overall efficiency and 1.6 of crest factor can be achieved withn200-V line input voltage. The measured line input current harmonicsnsatisfy IEC 1000-3-2 Class C requirements. The lamp power variationnrange is automatically limited within ±15% for ±10% lineninput voltage variation without feedback control